That thing uses a external ps and my poweramp is not a gainclone. Nevermind iŽll connect all ps grounds including mains gnd to one point on the chassis, and tie up all signal grounds to a starground and run a thin wire to the ps ground star.

Are you using a metal case, with each ground, tied to the case, or are they isolated?

__________________
Two little mice fell in a bucket of cream. The first mouse quickly gave up and drowned. The second mouse, wouldn't quit. He struggled so hard that eventually he churned that cream into butter and crawled out.